JP7389084B2 - Terminal assembly structure - Google Patents

Description

The present invention relates to a terminal assembly structure in which a terminal is fastened and assembled to a holder using a fastening member such as a bolt.

This type of terminal assembly structure is disclosed in Patent Document 1. In the device disclosed in Patent Document 1, a terminal plate attached to the tip of a cable is inserted into the tip of a terminal bolt protruding from the bottom of a terminal housing, and the terminal plate is fastened with a nut. . At this time, the tip of the terminal plate is strongly pressed into the recess of the outer circumferential wall that stands upright on the periphery of the bottom surface of the terminal housing, and the nut is tightened while positioning the terminal plate in the axial direction.

Utility Model Publication No. 5-73837

However, in the conventional terminal assembly structure, the tip of the terminal board must be firmly pressed into the recess in the outer peripheral wall of the terminal housing, resulting in poor assembly workability.

The present invention has been made in view of the problems of the prior art. Another object of the present invention is to provide a terminal assembly structure that can easily and reliably position and fasten a terminal to a holder and improve the workability of assembling the terminal.

A terminal assembly structure according to an aspect of the present invention includes a terminal having a crimping part to which a core wire of an electric wire is crimped and a fastening part to be fastened by a fastening member, and a terminal that is placed when the terminal is fastened. a holder having a pedestal, the holder includes a plurality of holders that extend in the fastening direction of the fastening member, are arranged around the fastening part of the assembled crimp terminal, and position the fastening part on the pedestal. It has ribs.

Preferably, the plurality of ribs are reinforcing ribs that are integrally formed to protrude from the inner peripheral surface of the peripheral wall of the holder.

The plurality of ribs are composed of a plurality of guide ribs that contact and guide both sides of the fastening portion of the terminal, and a plurality of abutment ribs that contact the arc-shaped tip of the fastening portion of the terminal. It is preferable.

The cover further includes a cover that covers the opening of the holder, and a packing that seals between the opening of the holder and the cover, and the cover has a locking hole for fixing the packing after the packing is assembled. The packing has a locking protrusion that is inserted into the locking hole of the cover and is locked, and when the front and back sides of the packing are normally assembled, the locking protrusion is inserted into the locking hole. By being inserted and locked, the packing is assembled and fixed to the cover, and when the packing is incorrectly assembled from the front to the back, the locking protrusion interferes with the upper end of the abutment rib, preventing the packing from being incorrectly assembled. Preferably, the assembly state is detected.

Preferably, the fastening portion of the terminal is formed into a substantially rectangular plate shape with an arc-shaped tip, and a fastening elongated hole through which a bolt as the fastening member is inserted is formed in the center.

According to the present invention, it is possible to provide a terminal assembly structure in which a terminal can be easily and reliably positioned and fastened to a holder, and the terminal assembly workability can be improved.

FIG. 2 is a cross-sectional view of essential parts showing an example of an assembled state of the terminal assembly structure according to the embodiment of the present invention. It is a perspective view of the holder in which the terminal of the said terminal assembly structure is assembled. It is a perspective view of the said terminal. FIG. 3 is a perspective view of another terminal. It is a perspective view of the pedestal part on which the said terminal is mounted. It is a perspective view of the bolt which fastens the said terminal to a holder. It is a perspective view of the cover which covers the opening of the said holder. It is a perspective view of the packing which seals between the opening of the said holder and a cover. FIG. 7 is a plan view showing a state in the middle of assembling the terminal to the holder. FIG. 3 is a cross-sectional view of essential parts showing a state in the middle of assembling the terminal to the holder. FIG. 3 is a plan view of main parts showing a state before the terminal assembled to the holder is fastened with a bolt. FIG. 3 is a cross-sectional view of main parts showing a state before the terminal assembled to the holder is fastened with a bolt. FIG. 3 is a cross-sectional view of main parts showing a state in which the terminal is incorrectly assembled to the holder. FIG. 3 is a cross-sectional view of essential parts showing a state in which a cover is assembled to the opening of the holder. FIG. 3 is a cross-sectional view of a main part showing a state in which a cover with a packing erroneously assembled is attached to an opening of the holder.

Hereinafter, a terminal assembly structure according to an embodiment of the present invention will be described in detail using the drawings.

FIG. 1 is a sectional view of essential parts showing an example of an assembled state of a terminal assembly structure according to an embodiment of the present invention. FIG. 2 is a perspective view of a holder in which a terminal of the terminal assembly structure is assembled. FIG. 3 is a perspective view of the terminal. FIG. 4 is a perspective view of another terminal. FIG. 5 is a perspective view of the pedestal portion on which the terminal is placed. FIG. 6 is a perspective view of a bolt that fastens the terminal to the holder. FIG. 7 is a perspective view of a cover that covers the opening of the holder. FIG. 8 is a perspective view of a packing that seals between the opening of the holder and the cover. FIG. 9 is a plan view showing a state in the middle of assembling the terminal to the holder. FIG. 10 is a sectional view of main parts showing a state in the middle of assembling the terminal to the holder. FIG. 11 is a plan view of main parts showing a state before the terminal assembled in the holder is fastened with bolts. FIG. 12 is a sectional view of main parts showing a state before the terminal assembled in the holder is fastened with a bolt. FIG. 13 is a sectional view of main parts showing a state in which the terminal is incorrectly assembled to the holder. FIG. 14 is a sectional view of essential parts showing a state in which the cover is assembled to the opening of the holder. FIG. 15 is a sectional view of a main part showing a state in which a cover with a wrongly assembled packing is attached to an opening of a holder.

As shown in FIGS. 1 to 8, the terminal assembly structure 1 includes a substantially rectangular plate-shaped crimp terminal 10 such as an LA terminal, a cylindrical DC (direct current) terminal 15, a resin holder 20, and a resin holder 20. The device includes an insulator (pedestal portion) 30 made of aluminum, a cover 40 made of resin, and a packing 50 made of rubber.

As shown in FIGS. 1 and 3, the crimp terminal 10 is formed by pressing a conductive metal plate, and the core wire (conductor) 13b exposed from the end of the insulation coating 13a of the electric wire 13 is crimp-connected. It has a fastening part 12 for fastening a bolt (fastening member) 14.

As shown in FIGS. 1 and 3, the crimp part 11 of the crimp terminal 10 has a pair of crimp pieces 11b, 11b on both sides of the bottom part 11a, and the electric wire 13 is exposed on the pair of crimp pieces 11b, 11b. The core wire 13b is crimped and crimped. The fastening part 12 of the crimp terminal 10 is formed into a substantially rectangular plate shape with a tip 12a having an arc shape and both side parts 12b, 12b extending in parallel, and an elliptical shape into which the bolt 14 is inserted. A fastening elongated hole 12c is formed. Note that the crimp terminal 10 is assembled into a peripheral wall 21 of the holder 20 from an upper cylindrical portion 22 of the holder 20, which will be described later. Further, the electric wire 13 crimped and connected to the crimp portion 11 of the crimp terminal 10 is a high-voltage electric wire through which a high-voltage current flows.

As shown in FIG. 4, the DC terminal 15 has a plurality of horizontally elongated slits 15b, and is integrally formed with the cylindrical wire connection portion 15a to which electric wires (not shown) are connected. It has a cylindrical counterpart connecting portion 15c to which a counterpart terminal or the like is connected. Note that the DC terminal 15 is assembled into the peripheral wall 21 of the holder 20 from a lower cylindrical portion 23 of the holder 20, which will be described later.

As shown in FIG. 2, the holder 20 includes an elliptical cylindrical peripheral wall 21, a pair of upper and lower cylindrical parts 22 and 23 that protrude horizontally from one longitudinal side of the peripheral wall 21 so as to overlap, and It integrally includes mounting flanges 24 protruding from the lower ends of the four corners in the longitudinal direction. Each mounting flange portion 24 is formed with a mounting hole 24a through which a bolt is inserted, which is used when mounting to a vehicle body panel (not shown) or the like.

As shown in FIGS. 2, 9, and 12, an elliptical cylindrical portion 25 is integrally formed on the other side in the longitudinal direction of the center of the elliptical cylindrical peripheral wall 21 of the holder 20. As shown in FIGS. An oval cylindrical pedestal 29 made of metal or hard resin is fitted into the elliptical cylindrical portion 25, and the fastening portion 12 of the crimp terminal 10 is fastened and fixed with the bolt 14 via the flat washer 18. It has become.

As shown in FIGS. 2 and 9 to 12, it extends in the vertical direction Y from the cylindrical portion 22 side to the elliptical cylindrical portion 25 side of the inner peripheral surface 21b of the elliptical peripheral wall 21, and positions and fixes the insulator 30. A plurality of positioning ribs 26 are integrally formed so as to face each other at predetermined intervals. The plurality of positioning ribs 26 are integrally formed on the inner peripheral surface 21b of the elliptical cylindrical peripheral wall 21 and function as reinforcing ribs. Further, the vertical direction Y is the fastening direction of the bolt (fastening member) 14. Note that a rectangular notch 21e is formed in the lower central portion of the front side of the peripheral wall 21 for wiring an electric wire such as a mating terminal connected to the DC terminal 15.

Further, around the elliptical cylindrical portion 25 of the inner circumferential surface 21b of the elliptical cylindrical peripheral wall 21, a fastening portion is provided around the fastening portion 12 of the crimp terminal 10 that extends in the vertical direction Y and is fastened to the pedestal 29. 12 on the terminal mounting base 33 of the insulator 30. The plurality of ribs 27 and 28 are integrally formed on the inner peripheral surface 21b of the elliptical cylindrical peripheral wall 21 and function as reinforcing ribs. Further, the plurality of ribs 27 and 28 correspond to a plurality of guide ribs 27 that contact and guide both side portions 12b and 12b of the fastening portion 12 of the crimp terminal 10, and an arcuate tip 12a of the fastening portion 12 of the crimp terminal 10. It is composed of a plurality of abutting ribs 28 that are in contact with each other. More specifically, as shown in FIGS. 2, 9, and 12, three guide ribs 27 are integrally formed on the opposing inner peripheral surfaces 21b of the elliptical cylindrical peripheral wall 21 at regular intervals. . Furthermore, three abutment ribs 28 are integrally formed in the center of the arc-shaped inner circumferential surface 21b on the other side of the elliptical cylindrical circumferential wall 21 at regular intervals, and one abutment rib 28 is formed radially on each side of the abutting ribs 28. It is integrally formed with a protrusion.

As shown in FIGS. 5 and 10, the insulator (pedestal part) 30 guides the fastening part 12 of the crimp terminal 10 when the crimp terminal 10 is assembled and fastened in the holder 20. It has a wall 31 and a pair of side walls 32, 32 standing up from both sides of the bottom wall 31. A terminal mounting base 33 on which the fastening portion 12 of the crimp terminal 10 is placed when the crimp terminal 10 is assembled into the holder 20 is integrally formed at the rear (upper side) of the bottom wall 31 via an upright wall 34. has been done. Note that the insulator 30 is assembled into the holder 20 through the opening 21a of the peripheral wall 21. At this time, as shown in FIG. 10, the insulator 30 is positioned between the plurality of positioning ribs 26, and the bent front part 31a of the bottom wall 31 is formed in a recess formed at the lower base end of the upper cylindrical part 22. It is fixed by being fitted into 22a.

As shown in FIGS. 5 and 9 to 12, the pair of side walls 32, 32 of the insulator 30 are connected to the pair of crimp pieces of the crimp portion 11 of the crimp terminal 10 when the crimp terminal 10 is assembled into the holder 20. 11b, located at a position opposite to 11b. At the position of the pair of side walls 32, 32 where the pair of crimp pieces 11b, 11b of the assembled crimp terminal 10 face each other, there is a detection rib 35 that interferes with the crimp part 11 when the front and back sides of the crimp terminal 10 are incorrectly assembled. is provided. A pair of detection ribs 35 are protruded from an upright wall 34 located on the front side of the terminal mounting base 33 at an interval narrower than the entire width of the pair of crimp pieces 11b, 11b of the crimp portion 11. Further, between the pair of detection ribs 35, 35 of the upright wall 34, a pair of inclined ribs 36 for guiding the fastening portion 12 of the crimp terminal 10 to the terminal mounting base 33 is provided. Furthermore, as shown in FIG. 13, when the crimp terminal 10 is incorrectly assembled, the pair of crimp pieces 11b, 11b of the crimp part 11 are located on the lower side, and the front ends of the pair of crimp pieces 11b, 11b are located on the lower side. By contacting the detection ribs 35, 35, incorrect assembly of the crimp terminal 10 is detected. Further, from the front side of each inner surface 32a of the pair of side walls 32, 32 to the standing wall 34, when the crimp terminal 10 is assembled into the holder 20, the both sides 12b, 12b of the fastening portion 12 of the crimp terminal 10 are sandwiched. A plurality of inclined portions 37 are provided to protrude and support.

As shown in FIGS. 1, 7, and 14, the cover 40 covers the opening 21a of the elliptical cylindrical peripheral wall 21 of the holder 20, and the elliptical plate-shaped ceiling wall 41 and the peripheral wall 21 are sandwiched between the cover 40 and the elliptical plate-shaped ceiling wall 41. It has inner and outer circumferential walls 42 and 43 having an elliptical cylindrical shape. A pair of locking pieces 44, 44 each having a locking protrusion 44a is protruded from both sides of the outer peripheral wall 43 in the longitudinal direction so as to face each other. Then, each lock protrusion 44a of the pair of lock pieces 44, 44 of the cover 40 is locked to a frame-shaped locked portion 21d provided on the outer circumferential surface 21c of the peripheral wall 21, so that the cover 40 is secured to the peripheral wall 21. It is assembled and fixed so as to cover the opening 21a. Further, the inner circumferential wall 42 of the ceiling wall 41 of the cover 40 has locking holes 45 at the front, rear, right and left centers for fixing the packing 50 after the packing 50 is assembled. Note that the cover 40 is reinforced by an elliptical annular wall 46 provided within the inner circumferential wall portion 42 and a cross-shaped partition wall 47.

As shown in FIGS. 1, 8, and 14, the packing 50 is fitted between the inner and outer circumferential walls 42, 43 of the cover 40 to seal the gap with the opening 21a of the holder 20, and is formed in an elliptical ring shape. has been done. The packing 50 has locking protrusions 52 at the front, rear, left and right centers of the ceiling surface 51, which are inserted into the locking holes 45 of the cover 40 and locked. As shown in FIGS. 1 and 14, when the front and back sides of the packing 50 are normally assembled, the locking protrusion 52 is inserted into the locking hole 45 of the cover 40 and locked, so that the packing is attached to the cover 40. 50 is assembled and fixed. Further, as shown in FIG. 15, when the packing 50 is incorrectly assembled on the front and back sides, the locking protrusion 52 interferes with the upper end 28a of the abutting rib 28, and the incorrectly assembled state of the packing 50 is detected. ing.

According to the terminal assembly structure 1 of the above embodiment, when assembling the crimp terminal 10 to the holder 20, first, the insulator 30 is inserted through the opening 21a of the elliptical cylindrical peripheral wall 21 of the holder 20, and the insulator 30 is inserted into the peripheral wall 21. The insulator 30 is positioned and fixed using the positioning rib 26.

Next, after the DC terminal 15 is assembled into the peripheral wall 21 from the lower cylindrical portion 23 of the holder 20, the crimp terminal 10 is assembled into the peripheral wall 21 from the upper cylindrical portion 22 of the holder 20. At this time, as shown by the arrow in FIG. 9, when the fastening part 12 of the crimp terminal 10 is assembled and moved deep into the peripheral wall 21, the tip 12a of the fastening part 12 is moved to the inclination of the insulator 30, as shown in FIG. The fastening portion 12 is guided onto the terminal mounting base 33 by contacting the rib 36 .

Furthermore, when the fastening part 12 of the crimp terminal 10 is assembled deep into the peripheral wall 21, as shown in FIGS. I hit 28. At this time, the distal end 12a of the fastening section 12 abuts against the abutment rib 28 while the both sides 12b, 12b of the fastening section 12 are positioned between the plurality of guide ribs 27, 27 of the peripheral wall 21, so the distal end 12a of the fastening section 12 abuts against the abutment rib 28. There is no concern that it will hit the contact rib 28 strongly (so-called sticking). In addition, when the tip 12a of the fastening portion 12 hits the abutment rib 28, the position of the fastening portion 12 is corrected, so the screw hole 29b of the pedestal 29 can be confirmed from the long fastening hole 12c of the fastening portion 12. . This confirmation allows bolt fastening without adjusting the position of the crimp terminal 10.

In this way, when the crimp terminal 10 is assembled into the peripheral wall 21 of the holder 20, the side part 12b of the fastening part 12 is positioned by the guide rib 27 while the tip 12a of the fastening part 12 abuts against the abutment rib 28, so that the bolt It is easy to fasten and can improve assembly workability. That is, the crimp terminal 10 can be easily and reliably positioned within the peripheral wall 21 of the holder 20 and fastened with the bolt 14, thereby improving assembly workability. Further, by providing the guide ribs 27 and the abutting ribs 28 on the peripheral wall 21, the strength of the holder 20 can be improved.

Further, as shown in FIG. 13, when the crimp terminal 10 is assembled with the front and back reversed in the holder 20 in which the insulator 30 and the DC terminal 15 are assembled, the crimp terminal 10 is attached to the pair of detection ribs 35, 35 of the insulator 30. The pair of crimping pieces 11b, 11b come into contact with each other, and incorrect assembly can be detected.

In this way, the detection rib 35 of the insulator 30 eliminates the risk of incorrect assembly of the crimp terminal 10, and furthermore, the fastening portion 12 of the crimp terminal 10 is guided by the inclined rib 36 of the insulator 30 to the upper surface 29a of the pedestal 29. Since it is placed smoothly, assembly work efficiency is improved. Moreover, since the insulator 30 is made lighter by leaving only the detection rib 35 and the inclined rib 36, which are necessary parts so as not to interfere with the function, it is possible to reduce the weight of the entire terminal assembly structure 1.

Furthermore, as shown in FIG. 14, when the opening 21a of the holder 20 is closed with the cover 40 with the packing 50 assembled, the packing 50 is held on the upper surface of the upper end 28a of the abutment rib 28 of the holder 20, improving waterproofness. It will be done. Further, as shown in FIG. 15, when the packing 50 is assembled to the cover 40 in the opposite direction, the locking protrusion 52 interferes with the upper end 28a of the abutting rib 28, and an incorrectly assembled state of the packing 50 is detected. . In this manner, the upper end 28a of the abutment rib 28 of the holder 20 allows the packing 50 assembled to the cover 40 to be held and to detect incorrect assembly easily.

Although this embodiment has been described above, this embodiment is not limited to these, and various modifications can be made within the scope of the gist of this embodiment.

That is, according to the embodiment, the elliptical long hole formed in the fastening part of the crimp terminal is used as the bolt insertion part through which the bolt is inserted, but the bolt insertion part is not limited to the elliptical long hole. A circular long hole or a C-shaped opening may also be used.

Further, according to the embodiment described above, an oval cylindrical pedestal made of metal or hard resin for fastening crimp terminals is fitted and fixed in the elliptical cylindrical portion of the holder, but a metal pedestal may be insert-molded into the holder. , a resin pedestal may be integrally formed with the holder.

1 Terminal assembly structure 10 Crimp terminal (terminal)
11 Crimp part 12 Fastening part 12a Arc-shaped tip 12b, 12b Both sides 12c Long hole for fastening 13 Electric wire 13b Core wire 14 Bolt (fastening member)
20 Holder 21a Opening 27, 28 Multiple ribs (reinforcing ribs for positioning)
27 Guide rib 28 Abutment rib 28a Upper end 29 Pedestal 30 Insulator (pedestal part)
33 Terminal mounting base 35, 35 Pair of detection ribs 36 Inclined rib 40 Cover 45 Locking hole 50 Packing 52 Locking protrusion Y Vertical direction (fastening direction of fastening member)

Claims (3)

A terminal having a crimping part to which a core wire of an electric wire is crimped and connected, and a fastening part to be fastened by a fastening member;
a holder having a pedestal on which the terminal is placed when fastened;
Equipped with
The holder has a plurality of ribs that extend in the fastening direction of the fastening member and are arranged around the fastening portion of the assembled terminal to position the fastening portion on the pedestal,
The plurality of ribs are reinforcing ribs integrally formed to protrude from the inner circumferential surface of the peripheral wall of the holder toward the side where the pedestal is disposed, and
The plurality of ribs are composed of a plurality of guide ribs that contact and guide both sides of the fastening portion, and a plurality of abutting ribs that contact the arc-shaped tip of the fastening portion,
In the terminal assembly structure, when the fastening portion is placed on the pedestal, it is positioned on the pedestal from a side opposite to the side where the abutment rib is provided. a cover that covers the opening of the holder;
a packing that seals between the opening of the holder and the cover;
further comprising;
The cover has a locking hole for fixing the packing after the packing is assembled,
The packing has a locking protrusion that is inserted into and locked in the locking hole of the cover,
When the front and back surfaces of the packing are properly assembled, the locking protrusion is inserted into the locking hole and locked, so that the packing is assembled and fixed to the cover,
2. The terminal according to claim 1 , wherein when the packing is assembled incorrectly, the locking protrusion interferes with the upper end of the abutting rib, and the incorrectly assembled state of the packing is detected. Assembly structure. The fastening portion of the terminal is formed into a substantially rectangular plate shape with an arc-shaped tip, and a fastening elongated hole through which a bolt as the fastening member is inserted is formed in the center. 2. The terminal assembly structure described in 2 .

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